Cu-phthalocyanine pigments are a major class of organic pigments used in automotive coatings. However, difficulties controlling rheological properties can lead to decreased pigment loading or the need to use a pigment synergist ̶ the latter usually has a positive effect on rheology but can bring its own problems with leaching in the final application. Colour strength, floating and flooding during the application process are further challenges encountered by paint producers and users.

Advanced polymeric dispersing agents

Hoffmann’s paper will present the use of advanced polymeric dispersing agents for solvent-based and high-solids applications. These agents are based on advanced polymerisation technologies, such as controlled free radical polymerisation which enables tailor-made polymer architectures. This high level of structural control results in high density of pigment-affinic groups and a tailored stabilising chain, lowering the chance of pigment re-agglomeration whilst improving rheology and colouristics.